/* 全局样式 */
* {
  box-sizing: border-box;
  margin: 0;
  padding: 0;
}

html, body {
  height: 100%;
  width: 100%;
  overflow: hidden;
}

body {
  font-family: 'Avenir', Helvetica, Arial, sans-serif;
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
  color: #2c3e50;
  background-color: #f5f7fa;
}

a {
  color: #42b983;
  text-decoration: none;
}

button {
  cursor: pointer;
  padding: 0.5rem 1rem;
  background-color: #42b983;
  color: white;
  border: none;
  border-radius: 4px;
  font-size: 1rem;
  transition: background-color 0.3s;
}

button:hover {
  background-color: #3aa876;
}

button:active {
  background-color: #2d8a5f;
}